/*=============================================================================

  Library: HMPBundleFrame

  Copyright (c) German Cancer Research Center,
    Division of Medical and Biological Informatics

  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.

=============================================================================*/

#include "Event.h"

#include "EventConstants.h"

#include <Exception.h>

class EventData : public QSharedData
{

public:

  EventData(const QString& topic, const Dictionary& properties)
    : topic(topic), properties(properties)
  {
    validateTopicName(topic);
    this->properties.insert(EventConstants::EVENT_TOPIC, topic);
  }

  static void validateTopicName(const QString& topic)
  {
    if (topic.isEmpty())
    {
      throw InvalidArgumentException("empty topic");
    }

    // Can't start or end with a '/' but anywhere else is okay
    // Can't have "//" as that implies empty token
    if (topic.startsWith("/") || topic.endsWith("/") ||
        topic.contains("//"))
    {
      throw InvalidArgumentException(QString("invalid topic: %1").arg(topic));
    }

    QString::const_iterator topicEnd = topic.end();
    QChar A('A'), Z('Z'), a('a'), z('z'), zero('0'), nine('9');
    QChar dash('-'), slash('/'), underscore('_');
    for (QString::const_iterator i = topic.begin(); i < topicEnd; ++i)
    {
      QChar c(*i);
      if ((A <= c) && (c <= Z)) continue;
      if ((a <= c) && (c <= z)) continue;
      if ((zero <= c) && (c <= nine)) continue;
      if ((c == underscore) || (c == dash) || (c == slash)) continue;
      throw InvalidArgumentException(QString("invalid topic: %1").arg(topic));
    }
  }

  const QString topic;
  Dictionary properties;

};

//----------------------------------------------------------------------------
Event::Event()
  : d(0)
{

}

//----------------------------------------------------------------------------
Event::Event(const QString& topic, const Dictionary& properties)
  : d(new EventData(topic, properties))
{

}

//----------------------------------------------------------------------------
// This is fast thanks to implicit sharing
Event::Event(const Event &event)
  : d(event.d)
{

}

//----------------------------------------------------------------------------
Event::~Event()
{
}

//----------------------------------------------------------------------------
bool Event::isNull() const
{
  return !d;
}

//----------------------------------------------------------------------------
Event& Event::operator=(const Event& other)
{
  d = other.d;
  return *this;
}

//----------------------------------------------------------------------------
bool Event::operator==(const Event& other) const
{
  if (d == other.d)
    return true;

  if (d->topic == other.d->topic &&
      d->properties == other.d->properties)
    return true;

  return false;
}

//----------------------------------------------------------------------------
QVariant Event::getProperty(const QString& name) const
{
  return d->properties[name];
}

//----------------------------------------------------------------------------
bool Event::containsProperty(const QString& name) const
{
  if (EventConstants::EVENT_TOPIC == name)
  {
   return true;
  }
  return d->properties.contains(name);
}

//----------------------------------------------------------------------------
QStringList Event::getPropertyNames() const
{
  return d->properties.keys();
}

//----------------------------------------------------------------------------
const QString& Event::getTopic() const
{
  return d->topic;
}

//----------------------------------------------------------------------------
bool Event::matches(const LDAPSearchFilter& filter) const
{
  return filter.matchCase(d->properties);
}
